summaryrefslogtreecommitdiffstats
path: root/storage/innobase/dict/dict0boot.cc
blob: 5516bce920bcac2107cfe3ac20046493ea37c1a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
/*****************************************************************************

Copyright (c) 1996, 2017, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2016, 2022, MariaDB Corporation.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA

*****************************************************************************/

/**************************************************//**
@file dict/dict0boot.cc
Data dictionary creation and booting

Created 4/18/1996 Heikki Tuuri
*******************************************************/

#include "dict0boot.h"
#include "dict0crea.h"
#include "btr0btr.h"
#include "dict0load.h"
#include "trx0trx.h"
#include "srv0srv.h"
#include "ibuf0ibuf.h"
#include "buf0flu.h"
#include "log0recv.h"
#include "os0file.h"

/** The DICT_HDR page identifier */
static constexpr page_id_t hdr_page_id{DICT_HDR_SPACE, DICT_HDR_PAGE_NO};

/** @return the DICT_HDR block, x-latched */
static buf_block_t *dict_hdr_get(mtr_t *mtr)
{
  /* We assume that the DICT_HDR page is always readable and available. */
  return buf_page_get_gen(hdr_page_id, 0, RW_X_LATCH, nullptr, BUF_GET, mtr);
}

/**********************************************************************//**
Returns a new table, index, or space id. */
void
dict_hdr_get_new_id(
/*================*/
	table_id_t*		table_id,	/*!< out: table id
						(not assigned if NULL) */
	index_id_t*		index_id,	/*!< out: index id
						(not assigned if NULL) */
	uint32_t*		space_id)	/*!< out: space id
						(not assigned if NULL) */
{
	ib_id_t		id;
	mtr_t		mtr;

	mtr.start();
	buf_block_t* dict_hdr = dict_hdr_get(&mtr);

	if (table_id) {
		id = mach_read_from_8(DICT_HDR + DICT_HDR_TABLE_ID
				      + dict_hdr->page.frame);
		id++;
		mtr.write<8>(*dict_hdr, DICT_HDR + DICT_HDR_TABLE_ID
			     + dict_hdr->page.frame, id);
		*table_id = id;
	}

	if (index_id) {
		id = mach_read_from_8(DICT_HDR + DICT_HDR_INDEX_ID
				      + dict_hdr->page.frame);
		id++;
		mtr.write<8>(*dict_hdr, DICT_HDR + DICT_HDR_INDEX_ID
			     + dict_hdr->page.frame, id);
		*index_id = id;
	}

	if (space_id) {
		*space_id = mach_read_from_4(DICT_HDR + DICT_HDR_MAX_SPACE_ID
					     + dict_hdr->page.frame);
		if (fil_assign_new_space_id(space_id)) {
			mtr.write<4>(*dict_hdr,
				     DICT_HDR + DICT_HDR_MAX_SPACE_ID
				     + dict_hdr->page.frame, *space_id);
		}
	}

	mtr.commit();
}

/** Update dict_sys.row_id in the dictionary header file page. */
void dict_hdr_flush_row_id(row_id_t id)
{
  mtr_t mtr;
  mtr.start();
  buf_block_t* d= dict_hdr_get(&mtr);
  byte *row_id= DICT_HDR + DICT_HDR_ROW_ID + d->page.frame;
  if (mach_read_from_8(row_id) < id)
    mtr.write<8>(*d, row_id, id);
  mtr.commit();
}

/** Create the DICT_HDR page on database initialization.
@return error code */
dberr_t dict_create()
{
	ulint		root_page_no;

	dberr_t err;
	mtr_t mtr;
	mtr.start();
	compile_time_assert(DICT_HDR_SPACE == 0);

	/* Create the dictionary header file block in a new, allocated file
	segment in the system tablespace */
	buf_block_t* d = fseg_create(fil_system.sys_space,
				     DICT_HDR + DICT_HDR_FSEG_HEADER, &mtr,
                                     &err);
	if (!d) {
		goto func_exit;
	}
	ut_a(d->page.id() == hdr_page_id);

	/* Start counting row, table, index, and tree ids from
	DICT_HDR_FIRST_ID */
	mtr.write<8>(*d, DICT_HDR + DICT_HDR_ROW_ID + d->page.frame,
		     DICT_HDR_FIRST_ID);
	mtr.write<8>(*d, DICT_HDR + DICT_HDR_TABLE_ID + d->page.frame,
		     DICT_HDR_FIRST_ID);
	mtr.write<8>(*d, DICT_HDR + DICT_HDR_INDEX_ID + d->page.frame,
		     DICT_HDR_FIRST_ID);

	ut_ad(!mach_read_from_4(DICT_HDR + DICT_HDR_MAX_SPACE_ID
				+ d->page.frame));

	/* Obsolete, but we must initialize it anyway. */
	mtr.write<4>(*d, DICT_HDR + DICT_HDR_MIX_ID_LOW + d->page.frame,
		     DICT_HDR_FIRST_ID);

	/* Create the B-tree roots for the clustered indexes of the basic
	system tables */

	/*--------------------------*/
	root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
				  fil_system.sys_space, DICT_TABLES_ID,
				  nullptr, &mtr, &err);
	if (root_page_no == FIL_NULL) {
		goto func_exit;
	}

	mtr.write<4>(*d, DICT_HDR + DICT_HDR_TABLES + d->page.frame,
		     root_page_no);
	/*--------------------------*/
	root_page_no = btr_create(DICT_UNIQUE,
				  fil_system.sys_space, DICT_TABLE_IDS_ID,
				  nullptr, &mtr, &err);
	if (root_page_no == FIL_NULL) {
		goto func_exit;
	}

	mtr.write<4>(*d, DICT_HDR + DICT_HDR_TABLE_IDS + d->page.frame,
		     root_page_no);
	/*--------------------------*/
	root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
				  fil_system.sys_space, DICT_COLUMNS_ID,
				  nullptr, &mtr, &err);
	if (root_page_no == FIL_NULL) {
		goto func_exit;
	}

	mtr.write<4>(*d, DICT_HDR + DICT_HDR_COLUMNS + d->page.frame,
		     root_page_no);
	/*--------------------------*/
	root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
				  fil_system.sys_space, DICT_INDEXES_ID,
				  nullptr, &mtr, &err);
	if (root_page_no == FIL_NULL) {
		goto func_exit;
	}

	mtr.write<4>(*d, DICT_HDR + DICT_HDR_INDEXES + d->page.frame,
		     root_page_no);
	/*--------------------------*/
	root_page_no = btr_create(DICT_CLUSTERED | DICT_UNIQUE,
				  fil_system.sys_space, DICT_FIELDS_ID,
				  nullptr, &mtr, &err);
	if (root_page_no == FIL_NULL) {
		goto func_exit;
	}

	mtr.write<4>(*d, DICT_HDR + DICT_HDR_FIELDS + d->page.frame,
		     root_page_no);
func_exit:
	mtr.commit();
	return err ? err : dict_boot();
}

/*****************************************************************//**
Initializes the data dictionary memory structures when the database is
started. This function is also called when the data dictionary is created.
@return DB_SUCCESS or error code. */
dberr_t dict_boot()
{
	dict_table_t*	table;
	dict_index_t*	index;
	mem_heap_t*	heap;
	mtr_t		mtr;

	static_assert(DICT_NUM_COLS__SYS_TABLES == 8, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_TABLES == 10, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_TABLE_IDS == 2, "compatibility");
	static_assert(DICT_NUM_COLS__SYS_COLUMNS == 7, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_COLUMNS == 9, "compatibility");
	static_assert(DICT_NUM_COLS__SYS_INDEXES == 8, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_INDEXES == 10, "compatibility");
	static_assert(DICT_NUM_COLS__SYS_FIELDS == 3, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_FIELDS == 5, "compatibility");
	static_assert(DICT_NUM_COLS__SYS_FOREIGN == 4, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_FOREIGN == 6, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_FOREIGN_FOR_NAME == 2,
		      "compatibility");
	static_assert(DICT_NUM_COLS__SYS_FOREIGN_COLS == 4, "compatibility");
	static_assert(DICT_NUM_FIELDS__SYS_FOREIGN_COLS == 6, "compatibility");

	mtr.start();
	/* Create the hash tables etc. */
	dict_sys.create();

	dberr_t err;
	const buf_block_t *d = buf_page_get_gen(hdr_page_id, 0, RW_X_LATCH,
						nullptr, BUF_GET, &mtr, &err);
        if (!d) {
		mtr.commit();
		return err;
        }

	heap = mem_heap_create(450);

	dict_sys.lock(SRW_LOCK_CALL);

	const byte* dict_hdr = &d->page.frame[DICT_HDR];

	/* Because we only write new row ids to disk-based data structure
	(dictionary header) when it is divisible by
	DICT_HDR_ROW_ID_WRITE_MARGIN, in recovery we will not recover
	the latest value of the row id counter. Therefore we advance
	the counter at the database startup to avoid overlapping values.
	Note that when a user after database startup first time asks for
	a new row id, then because the counter is now divisible by
	..._MARGIN, it will immediately be updated to the disk-based
	header. */

	dict_sys.recover_row_id(mach_read_from_8(dict_hdr + DICT_HDR_ROW_ID));
	if (uint32_t max_space_id
	    = mach_read_from_4(dict_hdr + DICT_HDR_MAX_SPACE_ID)) {
		max_space_id--;
		fil_assign_new_space_id(&max_space_id);
	}

	/* Insert into the dictionary cache the descriptions of the basic
	system tables */
	/*-------------------------*/
	table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_TABLES],
				     fil_system.sys_space,
				     DICT_NUM_COLS__SYS_TABLES, 0, 0, 0);
	dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0,
			       MAX_FULL_NAME_LEN);
	dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 8);
	/* ROW_FORMAT = (N_COLS >> 31) ? COMPACT : REDUNDANT */
	dict_mem_table_add_col(table, heap, "N_COLS", DATA_INT, 0, 4);
	/* The low order bit of TYPE is always set to 1.  If ROW_FORMAT
	is not REDUNDANT or COMPACT, this field matches table->flags. */
	dict_mem_table_add_col(table, heap, "TYPE", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "MIX_ID", DATA_BINARY, 0, 0);
	/* MIX_LEN may contain additional table flags when
	ROW_FORMAT!=REDUNDANT. */
	dict_mem_table_add_col(table, heap, "MIX_LEN", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "CLUSTER_NAME", DATA_BINARY, 0, 0);
	dict_mem_table_add_col(table, heap, "SPACE", DATA_INT, 0, 4);

	table->id = DICT_TABLES_ID;

	dict_table_add_system_columns(table, heap);
	table->add_to_cache();
	dict_sys.sys_tables = table;
	mem_heap_empty(heap);

	index = dict_mem_index_create(table, "CLUST_IND",
				      DICT_UNIQUE | DICT_CLUSTERED, 1);

	dict_mem_index_add_field(index, "NAME", 0);

	index->id = DICT_TABLES_ID;
	err = dict_index_add_to_cache(
		index, mach_read_from_4(dict_hdr + DICT_HDR_TABLES));
	ut_a(err == DB_SUCCESS);
	ut_ad(!table->is_instant());
	table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
		UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));

	/*-------------------------*/
	index = dict_mem_index_create(table, "ID_IND", DICT_UNIQUE, 1);
	dict_mem_index_add_field(index, "ID", 0);

	index->id = DICT_TABLE_IDS_ID;
	err = dict_index_add_to_cache(
		index, mach_read_from_4(dict_hdr + DICT_HDR_TABLE_IDS));
	ut_a(err == DB_SUCCESS);

	/*-------------------------*/
	table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_COLUMNS],
				     fil_system.sys_space,
				     DICT_NUM_COLS__SYS_COLUMNS, 0, 0, 0);
	dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 8);
	dict_mem_table_add_col(table, heap, "POS", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
	dict_mem_table_add_col(table, heap, "MTYPE", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "PRTYPE", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "LEN", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "PREC", DATA_INT, 0, 4);

	table->id = DICT_COLUMNS_ID;

	dict_table_add_system_columns(table, heap);
	table->add_to_cache();
	dict_sys.sys_columns = table;
	mem_heap_empty(heap);

	index = dict_mem_index_create(table, "CLUST_IND",
				      DICT_UNIQUE | DICT_CLUSTERED, 2);

	dict_mem_index_add_field(index, "TABLE_ID", 0);
	dict_mem_index_add_field(index, "POS", 0);

	index->id = DICT_COLUMNS_ID;
	err = dict_index_add_to_cache(
		index, mach_read_from_4(dict_hdr + DICT_HDR_COLUMNS));
	ut_a(err == DB_SUCCESS);
	ut_ad(!table->is_instant());
	table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
		UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));

	/*-------------------------*/
	table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_INDEXES],
				     fil_system.sys_space,
				     DICT_NUM_COLS__SYS_INDEXES, 0, 0, 0);

	dict_mem_table_add_col(table, heap, "TABLE_ID", DATA_BINARY, 0, 8);
	dict_mem_table_add_col(table, heap, "ID", DATA_BINARY, 0, 8);
	dict_mem_table_add_col(table, heap, "NAME", DATA_BINARY, 0, 0);
	dict_mem_table_add_col(table, heap, "N_FIELDS", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "TYPE", DATA_INT, 0, 4);
	/* SYS_INDEXES.SPACE is only read by in dict_drop_index_tree() */
	dict_mem_table_add_col(table, heap, "SPACE", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "PAGE_NO", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "MERGE_THRESHOLD", DATA_INT, 0, 4);

	table->id = DICT_INDEXES_ID;

	dict_table_add_system_columns(table, heap);
	/* The column SYS_INDEXES.MERGE_THRESHOLD was "instantly"
	added in MySQL 5.7 and MariaDB 10.2.2. Assign it DEFAULT NULL.
	Because of file format compatibility, we must treat SYS_INDEXES
	as a special case, relaxing some debug assertions
	for DICT_INDEXES_ID. */
	dict_table_get_nth_col(table, DICT_COL__SYS_INDEXES__MERGE_THRESHOLD)
		->def_val.len = UNIV_SQL_NULL;
	table->add_to_cache();
	dict_sys.sys_indexes = table;
	mem_heap_empty(heap);

	index = dict_mem_index_create(table, "CLUST_IND",
				      DICT_UNIQUE | DICT_CLUSTERED, 2);

	dict_mem_index_add_field(index, "TABLE_ID", 0);
	dict_mem_index_add_field(index, "ID", 0);

	index->id = DICT_INDEXES_ID;
	err = dict_index_add_to_cache(
		index, mach_read_from_4(dict_hdr + DICT_HDR_INDEXES));
	ut_a(err == DB_SUCCESS);
	ut_ad(!table->is_instant());
	table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
		UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));

	/*-------------------------*/
	table = dict_table_t::create(dict_sys.SYS_TABLE[dict_sys.SYS_FIELDS],
				     fil_system.sys_space,
				     DICT_NUM_COLS__SYS_FIELDS, 0, 0, 0);
	dict_mem_table_add_col(table, heap, "INDEX_ID", DATA_BINARY, 0, 8);
	dict_mem_table_add_col(table, heap, "POS", DATA_INT, 0, 4);
	dict_mem_table_add_col(table, heap, "COL_NAME", DATA_BINARY, 0, 0);

	table->id = DICT_FIELDS_ID;

	dict_table_add_system_columns(table, heap);
	table->add_to_cache();
	dict_sys.sys_fields = table;
	mem_heap_free(heap);

	index = dict_mem_index_create(table, "CLUST_IND",
				      DICT_UNIQUE | DICT_CLUSTERED, 2);

	dict_mem_index_add_field(index, "INDEX_ID", 0);
	dict_mem_index_add_field(index, "POS", 0);

	index->id = DICT_FIELDS_ID;
	err = dict_index_add_to_cache(
		index, mach_read_from_4(dict_hdr + DICT_HDR_FIELDS));
	ut_a(err == DB_SUCCESS);
	ut_ad(!table->is_instant());
	table->indexes.start->n_core_null_bytes = static_cast<uint8_t>(
		UT_BITS_IN_BYTES(unsigned(table->indexes.start->n_nullable)));

	mtr.commit();

	err = ibuf_init_at_db_start();

	if (err == DB_SUCCESS || srv_force_recovery >= SRV_FORCE_NO_DDL_UNDO) {
		err = DB_SUCCESS;
		/* Load definitions of other indexes on system tables */

		dict_load_sys_table(dict_sys.sys_tables);
		dict_load_sys_table(dict_sys.sys_columns);
		dict_load_sys_table(dict_sys.sys_indexes);
		dict_load_sys_table(dict_sys.sys_fields);
		dict_sys.unlock();
		dict_sys.load_sys_tables();
	} else {
		dict_sys.unlock();
	}

	return err;
}